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LOANS HELD FOR INVESTMENT, NET - Past Due Status (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | $ 9,660,907 | $ 9,244,661
Non-accrual | 36,301 | 40,307
Aggregate outstanding balance | 365 | 3,000
Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 73,912 | 116,696
30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 35,894 | 61,242
60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 1,352 | 12,146
Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 365 | 3,001
Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 9,586,995 | 9,127,965
Total real estate loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 8,689,230 | 8,294,204
Non-accrual | 8,805 | 12,676
Total real estate loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 32,545 | 77,109
Total real estate loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 22,979 | 57,385
Total real estate loans | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 420 | 5,103
Total real estate loans | Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 341 | 1,945
Total real estate loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 8,656,685 | 8,217,095
One-to-four family residential and cooperative/condominium apartment |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 691,586 | 669,282
Non-accrual | 3,128 | 7,623
One-to-four family residential and cooperative/condominium apartment | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 3,890 | 13,739
One-to-four family residential and cooperative/condominium apartment | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 1 | 3,294
One-to-four family residential and cooperative/condominium apartment | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 420 | 877
One-to-four family residential and cooperative/condominium apartment | Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 341 | 1,945
One-to-four family residential and cooperative/condominium apartment | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 687,696 | 655,543
Multifamily residential and residential mixed-use |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 3,654,164 | 3,356,346
Multifamily residential and residential mixed-use | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 3,619 | 34,322
Multifamily residential and residential mixed-use | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 3,619 | 30,983
Multifamily residential and residential mixed-use | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 | 3,339
Multifamily residential and residential mixed-use | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 3,650,545 | 3,322,024
Commercial real estate ("CRE") |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 4,091,372 | 3,945,948
Non-accrual | 5,020 | 5,053
Commercial real estate ("CRE") | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 15,114 | 29,048
Commercial real estate ("CRE") | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 10,094 | 23,108
Commercial real estate ("CRE") | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 | 887
Commercial real estate ("CRE") | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 4,076,258 | 3,916,900
Acquisition, development, and construction |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 252,108 | 322,628
Non-accrual | 657 |
Acquisition, development, and construction | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 9,922 |
Acquisition, development, and construction | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 9,265 |
Acquisition, development, and construction | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 |
Acquisition, development, and construction | Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 |
Acquisition, development, and construction | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 242,186 | 322,628
Commercial and Industrial ("C&I") Loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 960,888 | 933,559
Non-accrual | 27,365 | 27,266
Commercial and Industrial ("C&I") Loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 40,240 | 39,115
Commercial and Industrial ("C&I") Loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 11,919 | 3,753
Commercial and Industrial ("C&I") Loans | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 932 | 7,040
Commercial and Industrial ("C&I") Loans | Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 24 | 1,056
Commercial and Industrial ("C&I") Loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 920,648 | 894,444
Other Loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 10,789 | 16,898
Non-accrual | 131 | 365
Other Loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 1,127 | 472
Other Loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 996 | 104
Other Loans | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 | 3
Other Loans | Loans 90 Days or More Past Due and Still Accruing Interest |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | 0 |
Other Loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Principal balances outstanding | $ 9,662 | $ 16,426

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